Auxiliary tread for tires.



E. BAHDELLE.

AUXILIARY TREAD FOR TIRES.

Arlon l n AR 2 I EMILE EABDELLE, or NEW'YoaK, N. Y.

AUXILIABY TREAD FOR TIRES.

Syeccatiemof Letters Patent.

Patented oet. 1e, 1917.

Application Bled March 2, 1917. Serial No. 151,988.

To all 'whom it may concern:

Be itl known that I, EMILE BARDELLE, a citizen ofthe United States, andresident of the city of New York, Stapleton, borough ,of Richmond, inthe county of Richmond and State of New York, have invented a new andImproved Auxiliary Tready for Tires, ofiwhich the following isa full,clear,

vide an improved means for applying aI new or fresh tread member to thesame shoe after the prfevious tread member has become wornloutordisabled.

With'the foregoing and other objects in view the invention consists inthe arrangelment and combination of parts hereinafterdescribed andclaimed, and while the invention i's not restricted tothe exact detailsof 'construction disclosed or suggested herein, Vstill for the purposeof illustrating a pracjtical embodiment thereof reference is had 'to4the `accompanying drawing'sin which like referencefcharacters designatethe same pags 1n the seyeral v1ews,and 1n whichiglure 1 is a verticaltransverse section a diagonal plane correspondingto the lines 1-1 ofFigs. 3 and 4.

Fi 2 is'a vertical transverse section on i the lignes 2F2 of Figs. 3 and4.

Fig 3 is a plan view cfa portion of a -shpe having my improved treadsecured theretoyn Fig. 4`s a verticallongitudinal section of thesaine'.,

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Referring nowv more particularly to the drawings I show 11.-pneumatictire comprisin ashoe 10 ofany suitable or conventional design ofconstruction and adapted to house and protect `any standard 'inner tube11. 'Myinveiition has nothing to do with the means for securing theshoeto the wheel rim and hence these features are not shown. The outerortread portion of the shoe is so'constructed as to provide acircumerential channel 412 extending entirely around the shoe andapproximately fully across the tread portion thereof but bounded byparallel vertical walls 13, said-walls, however, being provided withlateral V-shaped inden tations or notches 13 systematically arranged andequally spaced all around the shoe. l do not wish to be unnecessarilylimited, however, to the forni or .disposition of the walls 13 inasmuchas the precise construction or arrangement thereof is subject to more orless variation in practice. The bottom of the channel 12 may be of anysuitable iform but shown herein as substantially flat in cross sectionor cylindrical with respect to the tire as a whole.

, The auxiliary tread consists of a continuous annular member, themain-portion 11i ofwhich -lies in andffills the channel 12. The Ioutersurface of the body 14 is providedV with any suitable character ordesign of projections 1 5 for lanti-skid pur poses. These projectionsare shown in the nature of ribs, the V- shaped ends of which extendlaterally beyond the `main planes of the walls 13, said ends andthe'portions 14! of the body directly within or beneath the sameextending into the notches 13 filling the same. These portions letinterlocking in or with the notches13 serve as keys preventing anypossibility of creeping or circumferential movement of the `auxiliarytread around the shoe.

Thelshoe is provided with any suitable number of preferablyequallyspaced transverse slots 16. The length of each slot in the directiontransverse ofthe wheel may be equal to or greater or less than the widthof the auxiliary tread,but 'each slot is shown herein as beingtaperedsomewhat inwardly. The width of the slot in a directioncircumferential of the wheel is considerably less than the length of theslot, say, for example, from one quarter to one half of an inch in suchwidth. l

For each slot i6 formed in the shoe there is provided for the auxiliarytread 14 a tongue 17 projecting radially inwardly through such slot. Theends of the tongue are preferably beveled to correspond to the shape ofthe ends of the slot into which they are snugly fitted and the in nerend ofthe tongue 'may be substantially parallel with. the bottom orinner wall of the auxiliary tread body 14, (see Fig. Formed `on orotherwise permanently and strongly'secured to said inner end or ed e ofthe tongue are a pair of iaps 18 exten ing in opposite directions fromeach other circumferentiall of the shoe and lying betweenthe inner Wa lof' tha shoe and the outer wall of the inner tube 1l. These flaps may beof an suitable length, but I indicate such lengt viding for the {iapfrom one tongue to reach approximately to the adjacent Hap of thenextadjacent tongue. (See Fig. 4.) By providing am le length for thetongues theapplication o the auxiliary tread to the shoe 1s facilitatedand no objection obtains in having a slight space as indicated at 19between the Flaps and the slotted portion of the shoe. These tongues andflaps serve as anchoring means preventingany possibilit of outwardradial movement of the auxi iary tread in practice. When the shoe,however. is removed from the wheel and the 'inner tube' is deflated theauxiliary tread may be removed and another put in its place whennecessary. The free ends of each pair of flaps may pass radially throughthe slot 16 and thereby the attached tongue will be drawn into itsplace. Thereafter the flaps are separated and laid out substantiallyflatly upon the inner wall of the shoe where the inner tube will come aeinst-them to hold them in place. Obvious y the auxiliary tread and itsanchoring means may be `formed of any suitable tough, strong, flexibleor even resilient material and hence I make no attempt in 'thisdisclosure to enumerate any of the many possible compositions that maybe used for this purpose.

I claim:

1. The combination with a pneumatic tire shoe having a circumferentialchannel extending along its tread portion and the shoe Within said treadportion being provided with a series of openings, of an auxiliary treadAfitted in said channel, and liexible tongue means carried by saidauxiliary tread -as 'integral parts [thereof and extending thenceradially inwardly through said open ings to anchor the auxiliary treaddetach* ably in place in connectionwith the shoe.

2. -The 'combination with a pneumatic tire A shoe having a series oftransversely extending slotsformed along its tread portion, of

an auxiliary tread for said shoe having a'4 ings through its treadportion andan inner tube, of an auxiliary tread havin attached anchormembers extending inward y through said openings,l and flexible memberssecured to tl1e-inner ends of said anchor members and adapted to liebetween the inner tube and the inner wall of the shoe to prevent outwardmovement of the auxiliary tread.

4. 'Ihe combination, with a pneumatic tire shoe having a.circumferential series of transversely arranged slots formed throughits tread portion, an inner tube', an auxiliary tread surrounding theshoe, a series of tongues lprojecting inwardly from the auxiliary treadthrough said slots, and flexible flaps carried by the inner ends of thetongues and adapted to lie substantially flatly between the .inner tubeand the inner surface oi the shoe, whereby the auxiliary tread isprevented from outward movement.

5. The' combination with a pneumatic tire shoe having a circumferentialchannel formed in its tread portion, said channel having laterallyprojecting V-shaped notches formed in its sidewalls, ,of an auxiliarytread, the bod of which is fitted wholly within said c annel andprovided with V-shaped projections litted 4into said notches, wherebycreeping movement of the n EMILE ivsARDnLLEY

